Add default NaN/Inf to C#, Java, Python (#5107)

* Add default NaN/Inf to C#, Java, Python

* Python NaN/Inf test added

* Remove MSVC2010/13 dependent code

tests/MyGame/MonsterExtra.py

@@ -0,0 +1,70 @@
+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: MyGame
+
+import flatbuffers
+
+class MonsterExtra(object):
+    __slots__ = ['_tab']
+
+    @classmethod
+    def GetRootAsMonsterExtra(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = MonsterExtra()
+        x.Init(buf, n + offset)
+        return x
+
+    # MonsterExtra
+    def Init(self, buf, pos):
+        self._tab = flatbuffers.table.Table(buf, pos)
+
+    # MonsterExtra
+    def TestfNan(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(4))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def TestfPinf(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(6))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('inf')
+
+    # MonsterExtra
+    def TestfNinf(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(8))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('-inf')
+
+    # MonsterExtra
+    def TestdNan(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(10))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def TestdPinf(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(12))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('inf')
+
+    # MonsterExtra
+    def TestdNinf(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(14))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('-inf')
+
+def MonsterExtraStart(builder): builder.StartObject(6)
+def MonsterExtraAddTestfNan(builder, testfNan): builder.PrependFloat32Slot(0, testfNan, float('nan'))
+def MonsterExtraAddTestfPinf(builder, testfPinf): builder.PrependFloat32Slot(1, testfPinf, float('inf'))
+def MonsterExtraAddTestfNinf(builder, testfNinf): builder.PrependFloat32Slot(2, testfNinf, float('-inf'))
+def MonsterExtraAddTestdNan(builder, testdNan): builder.PrependFloat64Slot(3, testdNan, float('nan'))
+def MonsterExtraAddTestdPinf(builder, testdPinf): builder.PrependFloat64Slot(4, testdPinf, float('inf'))
+def MonsterExtraAddTestdNinf(builder, testdNinf): builder.PrependFloat64Slot(5, testdNinf, float('-inf'))
+def MonsterExtraEnd(builder): return builder.EndObject()